have a reaad of how-to-get-the-best-out-of-this-forum
what SIM808 module are you using? give a link?
how have you connected the SIM808 to the UNO?
in particular how are you powering it?
can you send it AT commands and get a response?
have a reaad of how-to-get-the-best-out-of-this-forum
what SIM808 module are you using? give a link?
how have you connected the SIM808 to the UNO?
in particular how are you powering it?
can you send it AT commands and get a response?